GLSA-201708-05 : RAR and UnRAR: User-assisted execution of arbitrary code

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-201708-05
(RAR and UnRAR: User-assisted execution of arbitrary code)

A VMSF_DELTA memory corruption was discovered in which an integer
overflow can be caused in DataSize+CurChannel. The result is a negative
value of the “DestPos” variable which allows writing out of bounds
when setting Mem[DestPos].

Impact :

A remote attacker, by enticing a user to open a specially crafted
archive, could execute arbitrary code with the privileges of the process.

Workaround :

There is no known workaround at this time.

See also :

https://security.gentoo.org/glsa/201708-05

Solution :

All RAR users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose
'>=app-arch/rar-5.5.0_beta4_p20170628'
All UnRAR users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-arch/unrar-5.5.5'

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 102617 ()

Bugtraq ID:

CVE ID: CVE-2012-6706

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